Update on the bike

[xNE0x_imp]

I am skeptical myself on the dyno video.

Motorcycles are setup with a factory tune, which is calibrated by what's already on a stock bike. Even in the old days, especially with the older honda's... If you modified anything, you found yourself messing with jetting, etc. You may and can get away with modifying your motorcycle without making any corrections, but it is not recommended unless you know what your doing. So, adding a slip on for 9hp gain on the CB1100 without running a modified tune of some sort, seems far fetched to me. You might gain a couple horsepower, but not that much.